Question

label a diagram showing: photosynthesis, respiration, combustion, decomposition

1. how does carbon enter the atmosphere?
2. what role do plants play in the carbon cycle?
3. how does burning fossil fuels affect the carbon cycle?

Explanation:

1. Carbon enters the atmosphere through respiration (animals and plants releasing CO2), combustion (burning of fossil fuels, wood etc. releasing CO2), and decomposition (organic - matter breakdown releasing CO2).
2. Plants play a crucial role in the carbon cycle by taking in carbon - dioxide during photosynthesis and storing carbon in their biomass. They also release carbon dioxide during respiration.
3. Burning fossil fuels releases large amounts of stored carbon as carbon - dioxide into the atmosphere, increasing the concentration of greenhouse gases and disrupting the natural carbon cycle.

Answer:

1. Through respiration, combustion, and decomposition.
2. They take in CO2 during photosynthesis and store carbon, and release CO2 during respiration.
3. It releases large amounts of stored carbon as CO2 into the atmosphere, disrupting the natural carbon cycle.